Improvement in adjustable prop-joint foe carriages



A. SEARLS,

Carriage-Top.

No 70.628 Patented Nov. 5, I867 @(nitnh tat es l gs-tent @ffinr.

IMPROVEMENT IN ADJUSTABLE PROP-JOINT FOE GARRIAGES.

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TO 'WHOM THESE PRESENTS SHALL COME;

Be it known that I, A NSON SEARLS, of the city and county of SanFrancisco, State of California, have made a. new and useful Improvementin Making Prop-Joints for Carriage-Tops, which I call the AdjustableProp-Joint, of which the following specifications and accompanyingdrawings are an exact and clear description.

} Adjustable Prop-Joint.

The nature and purposeof my invention consist in constructingprop-joints for carriage-tops of malleable ironor other metals, with asocket-pivoted joint, in place of the old-style stump-joint, which Icall the centrejoint. Each side of this joint I construct ajointsuitable for extending or shortening either end to theldesired length. Icall this the extension-joint.

By the use of the centre-joint I propose to reduce the cost, increasethe strength, dispense with the old"- style rivet, and add to the beautyand finish of the same. By the extension-joint I propose to make thepropjoint adjustable to the desired length, thereby dispensingwith theusual expensive and troublesome mode of measuring each top and piecingout the stump-joint for each particular place.

For the purpose of extending or shortening, sliding joints with orwithout ratchets may be used, with setscrews or thimble-screws over thesame. To accomplish this purpose, I adopt a socket screw-joint, as shownin Figures 1 and 2. I

A is a section of the joint passing through a socket, G, and screwinginto the section B at D. By turning the section A it will screw out orinto the socket G, lengthening or shortening the joint at pleasure. Thesocket serves to strengthen the joint and cover all appearance of thescrew.

The socket may be made loose, to slip on or off at pleasure, oval,square, or any other form. Prop-joints with this improvement may be madecurved or straight. They also may be placed inside and close to thebows, from front to back bow, and from the back bow to the rail, and thetop, falling on the top of the joint, dispenses with the prop-block,preventing the breaking of the how by falling across the block.

Figure 2 is a sectional view.

Figure 3 is an isometrical view of the centre-joint.

E is the socket; F is the journal, fitting into the same; I is thepivot, passing through the journal F in section G, fastening the jointtogether.

' Claim.

1. An adjustable or cxtension prop-joint.

2. A socket, pivoted, or centre-joint, all substantially as describedandfor the purposes set forth.

San Francisco, California, June 27, 1867. i

ANSON SEARLS.

Witnesses ALMARIN 13. PAUL, Josnrn H. ATKINSON.

